CN111750018B - Anti-chiral structure, energy absorption buffer structure and automobile body - Google Patents
Anti-chiral structure, energy absorption buffer structure and automobile body Download PDFInfo
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- CN111750018B CN111750018B CN202010589878.9A CN202010589878A CN111750018B CN 111750018 B CN111750018 B CN 111750018B CN 202010589878 A CN202010589878 A CN 202010589878A CN 111750018 B CN111750018 B CN 111750018B
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- 238000010521 absorption reaction Methods 0.000 title abstract description 19
- 210000003041 ligament Anatomy 0.000 claims abstract description 112
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000003491 array Methods 0.000 description 17
- 230000008859 change Effects 0.000 description 11
- 238000005192 partition Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/128—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by the members, e.g. a flat strap, yielding through stretching, pulling apart
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R19/22—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact containing mainly cellular material, e.g. solid foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/123—Deformation involving a bending action, e.g. strap moving through multiple rollers, folding of members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Prostheses (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses an anti-chiral structure, an energy absorption buffer structure and an automobile body, wherein an anti-chiral unit is provided with a rotary negative poisson ratio structure, and stress is transmitted to a pitch circle through a ligament in the bearing process, so that the pitch circle has a rotating trend, and meanwhile, the ligament can be rolled up to form a negative poisson ratio state with a reduced compression section and an increased stretching section. After ligament deformation is finished, the pitch circle and the pitch circle are extruded, and at the moment, a second deformation stage is entered, and as the three anti-chiral units are respectively located in three mutually perpendicular planes in the three-dimensional coordinates, and the three pitch circles are mutually connected to form six connection points, the three pitch circles are not easy to misplace or deform when the hybrid chiral structure is impacted, and the whole structure is stable, so that the bearing capacity and the energy absorption capacity of the hybrid chiral structure are stronger.
Description
Technical Field
The invention relates to a high-performance engineering structure, in particular to an anti-chiral structure, an energy absorption buffer structure and an automobile body.
Background
The main characteristic of the anti-chiral structure is that the anti-chiral structure has a rotating negative poisson ratio structure.
As shown in fig. 1, two pitch circles on the same ligament are located on the same side of the ligament, and belong to an anti-chiral structure formed by sequentially connecting four anti-chiral units, wherein the anti-chiral structure is annular.
However, in the existing anti-chiral structure, two adjacent units are only in butt joint through two ligaments, so that the two units are extremely easy to misplace or deform when external force is applied, and the structural stability is poor, so that the bearing capacity and the energy absorption capacity of the anti-chiral structure are poor.
Disclosure of Invention
The invention provides an anti-chiral structure, an energy absorption buffer structure and an automobile body, which overcome the defects in the prior art. One of the technical schemes adopted for solving the technical problems is as follows:
The first anti-chiral unit comprises a first pitch circle and four first ligaments which are all connected with the first pitch circle in a tangent mode, the second anti-chiral unit comprises a second pitch circle and four second ligaments which are all connected with the second pitch circle in a tangent mode, the third anti-chiral unit comprises a third pitch circle and four third ligaments which are all connected with the third pitch circle in a tangent mode, the first anti-chiral unit is located in an XY plane, the second anti-chiral unit is located in an XZ plane, the first pitch circle is connected with the second pitch circle in a intersecting mode and is provided with two connecting points, and the third anti-chiral unit is located in the YZ plane and is connected with the first pitch circle and the second pitch circle in a intersecting mode and is provided with four connecting points.
In a preferred embodiment: the four first ligaments are arranged at intervals along the first pitch circle in a ring shape, two adjacent first ligaments are mutually perpendicular, and any one first ligament is parallel to the horizontal center line or the vertical center line of the first pitch circle; the four second ligaments are arranged at intervals along the second pitch circle, two adjacent second ligaments are mutually perpendicular, and any one second ligament is parallel to the horizontal center line or the vertical center line of the second pitch circle; the four third ligaments are arranged at intervals along the third pitch circle, two adjacent third ligaments are mutually perpendicular, and any one third ligament is parallel to the horizontal center line or the vertical center line of the third pitch circle.
In a preferred embodiment: the first anti-chiral unit, the second anti-chiral unit and the third anti-chiral unit are all made of hollow tubes.
The second technical scheme adopted by the invention for solving the technical problems is as follows: the energy absorption buffer structure comprises four partition boards which are sequentially arranged at intervals from top to bottom, and a plurality of anti-chiral structures which are arranged in an array are connected between two adjacent partition boards.
In a preferred embodiment: the thicknesses of the four partition boards are changed in a gradient mode.
In a preferred embodiment: in the anti-chiral structure of the same array, the first pitch diameter D1, the second pitch diameter D2 and the third pitch diameter D3 of a plurality of anti-chiral units are the same, the first ligament length L1, the second ligament length L2 and the third ligament length L3 are the same, and the first ligament thickness t1, the second ligament thickness t2 and the third ligament thickness t3 are the same; the first pitch diameter D1, the second pitch diameter D2 and the third pitch diameter D3 of the anti-chiral unit are all in gradient change in the anti-chiral structures of the three arrays; or, the three ligament lengths L1, L2 and L3 are all in gradient change in the anti-chiral structures of the three arrays; or, the thickness t1, t2 and t3 of the three ligaments are in gradient change in the anti-chiral structure of the three arrays.
In a preferred embodiment: the four clapboards are made of foamed aluminum.
The third technical scheme adopted by the invention for solving the technical problems is as follows: an automotive body employing an energy absorbing structure as claimed in any one of the preceding claims.
Compared with the background technology, the technical proposal has the following advantages:
1. The anti-chiral unit has a rotary negative poisson ratio structure, and the stress is conducted to the pitch circle through the ligament in the bearing process, so that the pitch circle has a rotating trend, and meanwhile, the ligament can be rolled up to form a negative poisson ratio state with a reduced compression section and an increased stretching section. After ligament deformation is finished, the pitch circle and the pitch circle are extruded, and at the moment, a second deformation stage is entered, and as the three anti-chiral units are respectively located in three mutually perpendicular planes in the three-dimensional coordinates, and the three pitch circles are mutually connected to form six connection points, the three pitch circles are not easy to misplace or deform when the hybrid chiral structure is impacted, and the whole structure is stable, so that the bearing capacity and the energy absorption capacity of the hybrid chiral structure are stronger.
2. The joint circles and the ligaments in the three anti-chiral units of the anti-chiral structure are completely identical in connection state, so that the negative poisson ratio states of the three anti-chiral units are identical when the anti-chiral structure is subjected to external force, and the bearing capacity and the energy absorption capacity of the anti-chiral structure are in a superimposed state and cannot be mutually offset.
3. The first anti-chiral unit, the second anti-chiral unit and the third anti-chiral unit are all made of hollow tubes, so that the overall weight of the mixed chiral structure can be reduced, and the weight reduction is realized.
4. The energy absorption buffer structure adopts the anti-chiral structure, so that the energy absorption performance and the buffering effect can be improved, and the energy absorption buffer structure can be applied to traffic industries such as automobiles, airplanes and the like, and even can be applied to building structures so as to improve the earthquake-resistant effect and the noise-eliminating effect of the building.
5. The thicknesses of the four partition plates are changed in a gradient manner, so that the energy-absorbing structure has better energy-absorbing characteristics, impact energy is absorbed layer by layer when the impact energy passes through the partition plates with different thicknesses, the impact energy is reduced, and a better buffering effect is achieved.
6. The first pitch diameter D1, the second pitch diameter D2 and the third pitch diameter D3 of the anti-chiral units are in gradient change in the anti-chiral structure of the three arrays, so that the buffer effect can be improved, and the bearing capacity and the energy absorption capacity of the whole structure are improved. The first ligament length L1, the second ligament length L2 and the third ligament length L3 of the anti-chiral unit are in gradient change in the anti-chiral structures of the three arrays; or the first ligament thickness t1, the second ligament thickness t2 and the third ligament thickness t3 of the anti-chiral unit are in gradient change in the three arrays of anti-chiral structures, so that the initial peak force of the energy absorption buffer structure can be improved, and the buffer effect during collision can be improved.
7. The four partition boards are made of foamed aluminum, are light materials, have high specific strength and specific modulus, and can improve the overall bearing capacity.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic diagram of the whole structure of the prior art with anti-chirality.
FIG. 2 is a schematic diagram showing the overall structure of the first anti-chiral unit according to the present invention.
FIG. 3 is a schematic diagram showing the connection of a first anti-chiral unit and a second anti-chiral unit according to the present invention.
FIG. 4 is a schematic diagram showing the overall structure of the anti-chiral structure according to the present invention.
FIG. 5 is a schematic perspective view of an energy absorbing structure according to the present invention.
FIG. 6 is a schematic front view of an energy absorbing structure of the present invention.
Detailed Description
In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the invention.
In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, the terms "fixedly attached" and "fixedly attached" are to be construed broadly as any manner of connection without any positional or rotational relationship between the two, i.e. including non-removable, fixed, integrally connected, and fixedly connected by other means or elements.
In the claims, specification and drawings of the present invention, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.
Referring to fig. 1 to 4, a preferred embodiment of the anti-chiral structure comprises a first anti-chiral unit 10, a second anti-chiral unit 20 and a third anti-chiral unit 30.
The first anti-chiral unit 10 comprises a first pitch circle 11 and four first ligaments 12 each tangentially connected to the first pitch circle 11, the second anti-chiral unit 20 comprises a second pitch circle 21 and four second ligaments 22 each tangentially connected to the second pitch circle 21, the third anti-chiral unit 30 comprises a third pitch circle 31 and four third ligaments 32 each tangentially connected to the third pitch circle 31, the first anti-chiral unit 10 is in the XY plane, the second anti-chiral unit 20 is in the XZ plane and the first pitch circle 11 intersects the second pitch circle 21 and has two connection points, the third chiral unit 30 is in the YZ plane and the third pitch circle 31 intersects both the first pitch circle 11 and the second pitch circle 21 and has four connection points.
In this embodiment, as shown in fig. 2, four first ligaments 12 are annularly arranged at intervals along the first node 11, two adjacent first ligaments 12 are perpendicular to each other, and any one first ligament 12 is parallel to the horizontal center line or the vertical center line of the first node 11; four second ligaments 22 are annularly arranged at intervals along the second pitch circle 21, two adjacent second ligaments 22 are mutually perpendicular, and any one second ligament 22 is parallel to the horizontal center line or the vertical center line of the second pitch circle 21; four third ligaments 32 are annularly spaced along the third pitch circle 31 and two adjacent third ligaments 32 are mutually perpendicular, any one third ligament 32 being parallel to the horizontal or vertical centre line of the third pitch circle 31. For convenience of description, the inner diameter of the first pitch circle 11, the inner diameter of the second pitch circle 21, and the inner diameter of the third pitch circle 31 are defined as D1, D2, D3, respectively, the length of the first ligament 12, the length of the second ligament 22, and the length of the third ligament 32 are defined as L1, L2, and L3, respectively, and the thickness of the first ligament 12, the thickness of the second ligament 22, and the thickness of the third ligament 32 are defined as t1, t2, and t3, respectively.
In this embodiment, the first, second and third anti-chiral units 10, 20 and 30 are all made of hollow tubes. And the hollow tubes of the three anti-chiral units 10, 20, 30 are all the same in size, i.e. the three pitch circles 11, 21, 31 are all the same in thickness and diameter, and all the ligaments 12, 22, 32 of the three anti-chiral units 10, 20, 30 are all the same in length and thickness. As shown in FIG. 4, the three anti-chiral units 10, 20, 30 are all made of hollow square tubes with a wall thickness of 0.1 mm. Or the three anti-chiral units 10, 20, 30 may be made of hollow round tubes as required, but not limited thereto.
The anti-chiral unit has a rotary negative poisson ratio structure, and the stress is conducted to the pitch circle through the ligament in the bearing process, so that the pitch circle has a rotating trend, and meanwhile, the ligament can be rolled up to form a negative poisson ratio state with a reduced compression section and an increased stretching section. After ligament deformation is finished, the pitch circle and the pitch circle are extruded, and at the moment, a second deformation stage is entered, and as the three anti-chiral units are respectively located in three mutually perpendicular planes in the three-dimensional coordinates, and the three pitch circles are mutually connected to form six connection points, the three pitch circles are not easy to misplace or deform when the hybrid chiral structure is impacted, and the whole structure is stable, so that the bearing capacity and the energy absorption capacity of the hybrid chiral structure are stronger.
Please refer to fig. 5 and 6, which are a preferred embodiment of an energy absorption buffer structure, which uses the above-mentioned anti-chiral structure, and includes four partition boards 40 arranged at intervals in sequence, and a plurality of anti-chiral structures arranged in an array are connected between two adjacent partition boards 40. As shown in fig. 5, the anti-chiral structures of the three arrays are the same, and all the arrays are formed by stacking four rows and four columns of square arrays in an upper layer and a lower layer. To make the connection between the partition 40 and the anti-chiral structure stronger and more stable, printing can be performed using 3D printing techniques.
In this embodiment, the thickness T of the four spacers 40 is changed in a gradient manner. For example, the thickness T of the four spacers 40 from top to bottom may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm; alternatively, the thickness T of the four spacers 40 from bottom to top may be 0.1 mm, 0.2 mm, 0.3 mm, or 0.4 mm, or may be set by using other gradient values, which is not limited thereto. And the four partition plates are made of foamed aluminum.
In this embodiment, in the anti-chiral structure of the same array, the diameters D1, D2, D3 of the first pitch circle 11, the second pitch circle 21, and the third pitch circle 31 of the plurality of anti-chiral units are the same, the lengths L1, L2, and L3 of the first ligament 12, the second ligament 22, and the third ligament 32 are the same, and the thicknesses t1, t2, and t3 of the first ligament 12, the second ligament 22, and the third ligament 32 are the same.
The diameters D1, D2 and D3 of the first pitch circle 11, the second pitch circle 21 and the third pitch circle 31 of the anti-chiral unit are all in gradient change in the anti-chiral structure of the three arrays; in the three-array reverse chiral structure, the diameters D1, D2, D3 of the first pitch circle 11, the second pitch circle 21, and the third pitch circle 31 in the uppermost array reverse chiral structure are 6mm, the diameters D1, D2, and D3 of the first pitch circle 11, the second pitch circle 21, and the third pitch circle 31 in the intermediate array reverse chiral structure are 7 mm, and the diameters D1, D2, and D3 of the first pitch circle 11, the second pitch circle 21, and the third pitch circle 31 in the lowermost reverse chiral structure are 8 mm. Or may be designed reversely, but not limited to.
The first ligament 12 length L1, the second ligament 22 length L2, and the third ligament 32 length L3 all vary in gradient in three arrays of anti-chiral structures; for example, the lengths L1, L2, and L3 of the first ligament 12, the second ligament 22, and the third ligament 32 of the uppermost array of the anti-chiral structures are 10 mm, the lengths L1, L2, and L3 of the first ligament 12, the second ligament 22, and the third ligament 32 of the intermediate array of the anti-chiral structures are 15 mm, and the lengths L1, L2, and L3 of the first ligament 12, the second ligament 22, and the third ligament 32 of the lowermost array of the anti-chiral structures are 20 mm. Or may be designed reversely, but not limited to.
The thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22, and the thickness t3 of the third ligament 32 are all graded in three arrays of anti-chiral structures. For example, the thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22 and the thickness t3 of the third ligament 32 of the opposite chiral structure in the uppermost array are all 1 mm, the thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22 and the thickness t3 of the third ligament 32 of the opposite chiral structure in the middle array are all 1.5 mm, and the thickness t1 of the first ligament 12, the thickness t2 of the second ligament 22 and the thickness t3 of the third ligament 32 of the opposite chiral structure in the lowermost array are all 2 mm. Or may be designed reversely, but not limited to.
According to actual needs, in the anti-chiral structure of the three arrays, one parameter is in gradient change, and the other two parameters keep the same value; such as: the first pitch circle 11 diameter D1, the second pitch circle 21 diameter D2, and the third pitch circle 31 diameter D3 of the anti-chiral unit may individually be graded in the three arrays of anti-chiral structures, while the first ligament 12 length L1, the second ligament 22 length L2, and the third ligament 32 length L3 of the anti-chiral unit maintain the same values in the three arrays of anti-chiral structures, and the first ligament 12 thickness t1, the second ligament 22 thickness t2, and the third ligament 32 thickness t3 of the anti-chiral unit maintain the same values in the three arrays of anti-chiral structures. Or in the anti-chiral structure of three arrays, wherein two parameters are in gradient change, and the other parameter keeps the same value; or all parameter values of the energy absorption buffer structure can be subjected to gradient change at the same time, not limited to the gradient change.
An automotive body employing an energy absorbing structure as claimed in any one of the preceding claims. Such as the floor of an automobile, an anti-collision structure, etc.
The energy absorption buffer structure is also applied to other transportation industries such as airplanes and the like, and can also be applied to the building industry, but is not limited to the above.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and therefore should not be taken as limiting the scope of the invention, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.
Claims (3)
1. Energy-absorbing buffer structure, its characterized in that: the device comprises four clapboards which are sequentially arranged at intervals from top to bottom, wherein the four clapboards are made of foamed aluminum materials, and a plurality of anti-chiral structures which are arranged in an array are connected between two adjacent clapboards;
The first anti-chiral unit comprises a first pitch circle and four first ligaments which are all connected with the first pitch circle in a tangent way, the second anti-chiral unit comprises a second pitch circle and four second ligaments which are all connected with the second pitch circle in a tangent way, the third anti-chiral unit comprises a third pitch circle and four third ligaments which are all connected with the third pitch circle in a tangent way, the first anti-chiral unit is positioned in an XY plane, the second anti-chiral unit is positioned in an XZ plane, the first pitch circle is connected with the second pitch circle in a intersecting way and is provided with two connecting points, and the third anti-chiral unit is positioned in the YZ plane, and the third pitch circle is connected with the first pitch circle and the second pitch circle in a intersecting way and is provided with four connecting points; the four first ligaments are arranged at intervals along the first pitch circle in a ring shape, two adjacent first ligaments are mutually perpendicular, and any one first ligament is parallel to the horizontal center line or the vertical center line of the first pitch circle; the first anti-chiral unit, the second anti-chiral unit and the third anti-chiral unit are all made of hollow tubes;
In the anti-chiral structure of the same array, the first pitch diameter D1, the second pitch diameter D2 and the third pitch diameter D3 of a plurality of anti-chiral units are the same, the first ligament length L1, the second ligament length L2 and the third ligament length L3 are the same, and the first ligament thickness t1, the second ligament thickness t2 and the third ligament thickness t3 are the same.
2. The energy absorbing structure of claim 1, wherein: the four second ligaments are arranged at intervals along the second pitch circle, two adjacent second ligaments are mutually perpendicular, and any one second ligament is parallel to the horizontal center line or the vertical center line of the second pitch circle; the four third ligaments are arranged at intervals along the third pitch circle, two adjacent third ligaments are mutually perpendicular, and any one third ligament is parallel to the horizontal center line or the vertical center line of the third pitch circle.
3. Automobile body, its characterized in that: use of an energy absorbing structure according to any one of claims 1 to 2.
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| CN202010589878.9A CN111750018B (en) | 2020-06-24 | 2020-06-24 | Anti-chiral structure, energy absorption buffer structure and automobile body |
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| CN202010589878.9A CN111750018B (en) | 2020-06-24 | 2020-06-24 | Anti-chiral structure, energy absorption buffer structure and automobile body |
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| CN111750018B true CN111750018B (en) | 2024-07-09 |
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| CN111649097B (en) * | 2020-06-24 | 2024-07-09 | 华侨大学 | Mixed chiral structure and buffering energy-absorbing structure |
| CN111660976A (en) * | 2020-06-29 | 2020-09-15 | 华侨大学 | Anti-manual nature filled structure and car anticollision roof beam |
| CN113719567A (en) * | 2021-07-22 | 2021-11-30 | 广州大学 | Three-dimensional claw-shaped structure with negative Poisson ratio characteristic and combination method thereof |
| CN113775682B (en) * | 2021-11-12 | 2022-02-08 | 太原理工大学 | Adjustable circular tube energy absorption/storage mechanism based on paper-cut structure |
| CN114922927A (en) * | 2022-05-19 | 2022-08-19 | 湖北三江航天万山特种车辆有限公司 | Bush |
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| WO2017035473A1 (en) * | 2015-08-26 | 2017-03-02 | The University Of New Hampshire | Chiral structures with adjustable auxetic effects |
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| CN110984417B (en) * | 2019-12-18 | 2021-06-15 | 青岛理工大学 | Anti-collision device combining chiral negative Poisson ratio structure and honeycomb structure |
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| CN111649097A (en) * | 2020-06-24 | 2020-09-11 | 华侨大学 | Mixed chiral structure and buffering energy-absorbing structure |
| CN212455329U (en) * | 2020-06-24 | 2021-02-02 | 华侨大学 | Mixed chiral structure and buffering energy-absorbing structure |
| CN212775299U (en) * | 2020-06-24 | 2021-03-23 | 华侨大学 | Anti-hand structure, energy-absorbing buffer structure and automobile body |
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